[5.3] fix schemaorg breadcrumb

[heelc29]

Pull Request for Issue #45894 .

Summary of Changes

property is breadcrumb not breadcrumbs
https://schema.org/WebPage

Testing Instructions

set up schemaorg and validate your site
https://validator.schema.org/

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

Link to documentations

Please select:

• No documentation changes for docs.joomla.org needed
• No documentation changes for manual.joomla.org needed

[richard67]

I have tested this item ✅ successfully on fc2286e

Hint for other testers: It needs a recent nightly build from last night or later or the 5.3.0-rc1 to reproduce the issue because the PR which created the issue was merged just before the 5.3.0-rc1 was created.

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45898.}

[bembelimen]

I have tested this item ✅ successfully on fc2286e

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45898.}

[richard67]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45898.}

[bembelimen]

Thx